maths problem

Question

Rearrange this formula to make b the subject.
b) Factorise x2+ x — 2

hence simplify

x^2+x-2 over x^2-4

Answer 1

(x²+x-2)/(x²-4)

(x+2)(x-1)/(x+2)(x-2)

factor out the two (x+2)s

(x-1)/(x-2) is the answer